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Direction of Arrival (DOA) Estimation Device and Method

Inactive Publication Date: 2014-11-13
KOREA ADVANCED INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a device and method for estimating the direction of arrival (DOA) of sounds with high spatial resolution and accuracy in underdetermined situations. The device can retrieve more sound sources in these situations.

Problems solved by technology

The suggestion, however, has drawback of errors and long time for the moving object to estimate DOA.
This means that there is difficulty of tracking DOA in the stationary noise environment.
However, the suggestion has drawbacks of low resolution and accuracy of DOA estimation, when the number of sound sources is not known.

Method used

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  • Direction of Arrival (DOA) Estimation Device and Method
  • Direction of Arrival (DOA) Estimation Device and Method
  • Direction of Arrival (DOA) Estimation Device and Method

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Embodiment Construction

[0054]The present invention will be explained below with reference to embodiments and drawings.

[0055]FIG. 1 illustrates a DOA estimation device according to an embodiment.

[0056]Referring to FIG. 1, the DOA estimation device 1 operates to estimate direction of arrival (DOA) of the signals. The DOA estimation device 1 may detect the signals outputted from the sound sources. The DOA estimation device 1 may retrieve source signals which are non-stationary, based on the detected signals, and calculate statistical distribution of the retrieved source signals. Based on the calculated statistical distribution, the DOA estimation device 1 may estimate the DOA of the impinging source signals. The DOA device 1 may be used for the purpose of at least one of: radar, sonar and biomedical signal retrieval.

[0057]The sound source can be where the signals are generated. The sound source may be at least one of car, bird, airplane, submarine, missile, and people. The sound source in terms of sound perc...

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Abstract

A direction of arrival (DOA) estimation device and method are provided, in which the DOA estimation device includes a sensor unit configured to detect a signal and comprising two or more sensors to output sensor signals as a detect signal in response to the detected signal, and a controller configured to calculate statistical distribution data indicative of statistical distribution of each of the sensor signals outputted from the two or more sensors, respectively, retrieve statistical distribution data indicative of statistical distribution of source signal which is non-stationary signal entrained in the signal of the calculated statistical distribution data, and estimate DOA of the source signal based on the retrieved statistical distribution data.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from Korean Patent Application No. 10-2013-0053828, filed on May 13, 2013, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]The present invention relates to a direction of arrival (DOA) estimation device, and more particularly, to a DOA estimation device based on 2p-th order signal with high-resolution capability in underdetermined case and noise signal subspace constraint optimization, and a method.[0004]2. Description of the Related Art[0005]Advancement in electronic, communication and mechanic technologies has enabled human race to live more comfortable. In many parts of human life, autonomous systems have been developed to move and work on behalf of human. The autonomous systems are so implemented to perceive signals from sound sources including human, airplanes, birds or submarines and...

Claims

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Application Information

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IPC IPC(8): G01S3/802
CPCG01S3/802G01S3/8006G01S3/14G01S3/12
Inventor YOO, CHANG DONGCHOI, JIN HO
Owner KOREA ADVANCED INST OF SCI & TECH
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